Share Capital - Summary of Share Capital (Detail) - shares
|
12 Months Ended |
Jun. 30, 2021 |
Jun. 30, 2020 |
Jun. 30, 2019 |
| 5.5% Preference shares [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
50,000
|
50,000
|
|
| Closing number of shares |
50,000
|
50,000
|
50,000
|
| BHP Group Limited [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
2,945,851,394
|
2,945,851,394
|
3,211,691,105
|
| Purchase of shares by ESOP Trusts |
(7,587,353)
|
(5,975,189)
|
(6,854,057)
|
| Employee share awards exercised following vesting |
6,948,683
|
6,893,113
|
5,902,588
|
| Movement in treasury shares under Employee Share Plans |
638,670
|
(917,924)
|
951,469
|
| Share bought back and cancelled |
|
|
(265,839,711)
|
| Closing number of shares |
2,945,851,394
|
2,945,851,394
|
2,945,851,394
|
| BHP Group Limited [member] | Shares held by the public [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
2,945,621,003
|
2,944,703,079
|
|
| Closing number of shares |
2,944,982,333
|
2,945,621,003
|
2,944,703,079
|
| BHP Group Limited [member] | Treasury shares [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
230,391
|
1,148,315
|
|
| Closing number of shares |
869,061
|
230,391
|
1,148,315
|
| BHP Group Limited [member] | Special Voting share of no par value [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
1
|
1
|
|
| Closing number of shares |
1
|
1
|
1
|
| BHP Group Limited [member] | DLC Dividend share [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
1
|
1
|
|
| Closing number of shares |
1
|
1
|
1
|
| BHP Group Plc [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
2,112,071,796
|
2,112,071,796
|
2,112,071,796
|
| Purchase of shares by ESOP Trusts |
(185,054)
|
(185,297)
|
(274,069)
|
| Employee share awards exercised following vesting |
173,644
|
222,245
|
275,984
|
| Movement in treasury shares under Employee Share Plans |
11,410
|
(36,948)
|
(1,915)
|
| Closing number of shares |
2,112,071,796
|
2,112,071,796
|
2,112,071,796
|
| BHP Group Plc [member] | Shares held by the public [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
2,112,069,025
|
2,112,032,077
|
|
| Closing number of shares |
2,112,057,615
|
2,112,069,025
|
2,112,032,077
|
| BHP Group Plc [member] | Treasury shares [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
2,771
|
39,719
|
|
| Closing number of shares |
14,181
|
2,771
|
39,719
|
| BHP Group Plc [member] | Special Voting share of US$0.50 par value [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
1
|
1
|
|
| Closing number of shares |
1
|
1
|
1
|
| BHP Group Plc [member] | 5.5% Preference shares [member] |
|
|
|
| Share capital issued |
|
|
|
| Opening number of shares |
50,000
|
50,000
|
|
| Closing number of shares |
50,000
|
50,000
|
50,000
|